Control means for cooling of dressing diamond or the like



J. LOECY, JR

Feb. 12, 1957 CONTROL MEANS EOE COOLING OF DRESSING DIAMOND OR THE LIKE Filed May 10, 1!?54 Lia w Evil-IE,

' mmvrox "Jase/w lascyJa Amnusys United States Patent CONTROL MEANS FOR COOLING 0F DRESSING DIAMOND OR THE LIKE Joseph Loecy, In, Euclid, Ohio Application May 10, 1954, Serial No. 428,728

1 Claim. (Cl. 125-11) This invention relates to an improved control combination for use in connection with a device requiring a cooling fluid during its operation, as for instance a diamond for dressing a grinding wheel.

in actual practice heretofore it has been left to the attendant to manipulate a valve for directing water or other cooling fluid to the point of dressing by the diamond whenever such operation is initiated so as to prevent burning of the diamond; but it has been found that the attendant can not always be depended upon and consequently there has resulted considerable damage to the diamond due to the excess heat Without any cooling medium, and hence considerable expense in replacing the burned diamond.

It is therefore the object of my present invention to devise a means whereby a cooling fluid will be automatically supplied to the point of the dressing or other operation simultaneously with the initiation of such operation and whereby such cooling may be continued throughout the performance of such operation and automatically terminated upon termination of such operation.

A further object is to devise a fluid-operated means that may be controlled by a single valve means for effecting the dressing or other operation and simultaneously supplying a cooling fluid to the point of such operation.

More specifically, my present invention consists in providing a fluid-actuated device and a supply of cooling fluid therefor, both of which may be initiated and discontinued in their respective operations simultaneously by means of a single fluid means with a single fluid-control valve; and this constitutes a more specific object of my present invention.

A further object of this invention is to devise a particular form of valve for use in the combination herein set forth.

Others objects will appear from the following description and claim when considered together with the accompanying drawing.

Fig. l is a general diagrammatic view illustrating the present organization, the unitary control means being shown in perspective;

Fig. 2 is a sectional view of the hydraulically operated valve which controls the flow of the cooling fluid to the point of use.

While my present invention is here illustrated in connection with a diamond turner, it is to be understood that it is capable of more general utility.

The particular form of diamond turner herein illustrated is more fully disclosed in my United States Letters Patent No. 2,644,442, July 7, 1953, to which reference may be had for a complete understanding of the same. Suflice here to say, the application of hydraulic pressure alternately to the rear and front ends of the piston 1a of the diamond turner 1 will force the same forwardly and rearwardly so as to cause forward and rearward movements, respectively, of the diamond holder and also turning movement of the same in only one direction by virtue of the particular mechanism provided in this particular F 2,781,035 Ce Patented Feb. 12, 1957 device as just referred to. That is to say, the diamond D may be moved to and from the work by means of fluid pressure and simultaneously given rotary movement also in only one direction of the straight-line movement so as to always present a fresh portion of the diamond and thus lengthen its life of usefulness. What we are primarily concerned with now in referring to this patent is to illustrate a diamond turner which requires a cooling fluid at the point of use and in which the diamond holder is manipulated by fluid means.

Referring now more in detail to the accompanying drawing, the diamond turner 1 is indicated as having a tube 2 for cooling fluid positioned so as to direct its flow at the point of the dressing operation by the diamond D and so as to thereby prevent burning of the same. This cooling fluid, as for instance water, may be obtained from a main supply line through the pipe or hose 3 and forced through the rotary hand valve 4 to the pipe or hose 5 to another part of the machine with which the diamond turner is associated. That is, with the valve 4 open and while the diamond turner is not in use, the water for cooling may be supplied from the line 3 and through the Valve 4 has a handle 4a for turning the same hose 5. in the conventional manner.

During the active period of the diamond turner 1, hydraulic or other fluid pressure is applied to and maintained upon the rear end of the piston 1a so as to hold the diamond in forward position. Such fluid pressure is sup. plied from a suitable source through the tube 6 and the old form of control valve 7, which has been properly set by means of the button 8, and thence through the tube 9 to the rear of the piston chamber of the diamond turner. At the same time the hydraulic or other fluid pressure will be exerted also through the tube it to the lower side of the plunger 11 so as to raise the same within its chamber 12 and thereby raise the valve 13 from its seat 14. The valve 13 controls the flow of cooling fluid from the supply tube 3 to the tube 2 and thence to the point of use of the diamond D and is connected to the tube 3 at a point between the source of supply and valve 4; and, when the valve 13 is open, the cooling fluid from the supply tube 3 will be diverted from the tube 5 and will be directed through the tube 2. At the same time that the fluid pressure is being exerted through tube 9 to the rear of the piston 1a of the diamond turner 1, the fluid pressure will be relieved from the front end of the same piston 1a out through the tube 15 and through the valve 7 to the discharge pipe or tube 16. Also, the fluid pressure will be relieved from the upper end of the valve plunger 11 through the tube 17 and valve 7 to the discharge tube 16.

I will here explain that, Whereas in Fig. l of the accompanying drawing the valve 7 is shown in position for forcing the plunger 1:: forwardly and for simultaneously opening the valve 13 according to the manner of operation above outlined, the illustration of valve 13 in Fig. 2 represents it in closed position which corresponds to the rearward position of the plunger 1a of the diamond turner.

From the above description it will be seen that by means of the single valve means 7 and the connections here shown, the flow of fluid pressure can be controlled so as to automatically open and hold open the cooling fluid control valve 13 whenever and while the diamond turner is operated. In other words, whenever the diamond turner is operated, the cooling fluid will be automatically supplied to the point of such dressing operation; and the flow of the cooling fluid to the diamond will be automatically discontinued when operation of the diamond turner is terminated.

In the above explanation, as applied to the illustration in Fig. l of the present drawing, it is assumed that the diamond turner 1 is in operation and that the cooling fluid is being supplied to the diamond D; and, upon 3 change of the position of the valve 7, the fluid pressure from the supply tube 6 maybe transmitted through the valve 7 and the tube 15 to the forward end of the piston 1a of the diamond turner so as to force thesame rear.- wardly while the fluid pressure at the rear end of the piston 1a will be relieved through the tube 9 and the valve 7 to the discharge tube 16; At the same time the fluid pressure will be applied also through the valve 7 and the tube 17 to the rear end of the plunger 11 so as to close the valve 13 and cut oil the cooling fluid to the diamond D, the fluid pressure at the forward end of the plunger 11 being relieved through the tube 10 to the a valve 7 and out through the discharge 16.

The valve chamber 12 is closed at its rear end by the disk 18 which has the retaining snap ring 19 in an annular groove within the rear or upper end of the body of the and straight-line movement of the valve for effective seating engagement.

The plunger 11 may be formed as a separate part from the valve plug member 13 and has a central opening to receive the reduced end portion of the member 13, the plunger 11 being held in assembly by engagement between an'annular shoulder 20 on the valve plug 13 and a snap' ring 21 in a groove in the rear reduced end portion of the valve member 13. There is a sealing ring between the plug member 13 and the plunger 11.

The casing of the valve chamber 12 is provided with the screw-threaded means of connection 22'and 23 for 3 cooling fluid to the tool according to whether it is being moved'to or from operative position, said fluid means in the tubes '2 and 3, respectively, in the assembly herein 7 disclosed; and this valve casing has also the screw-threaded means of connection 2 and 25 for the tubes 10 and 17,

, respectively. The valve casing is provided with a suitable there might be various modifications thereof without departing from the spirit of my invention as herein set forth and claimed. 7

My present organization possesses several practical ad-' vantages. Notably, with ,this device, the manipulation of a single valve 7 will serve to move the diamond into and out of operative position and will simultaneously control the'fiow of cooling fluid to the point of use of the diamond so as to prevent burning of the same. This means not only a saving in the cost of diamonds but also a saving in time incident to the changing of diamonds without this present improvement and there is ensured a more satisfactory result in the work because of the more dependable condition of the diamond at all times. Also, this combined operation of the diamond holder and the cooling means is efiected in a simple and yet positive and dependable manner, which is made possible by the fluidactuated valve 13 as part of this improved combination. Other practical advantages will no doubt readily suggest themselves to those who are familiar with the art to which the present invention relates.

What I claim is: p

In a device of the class described, a cylinder, a plunger reciprocatable in said cylinder, a tool carried by the outer end of said plunger, fluid-actuated valve means for con-,

trolling the supply of a cooling fluid to the tool when in operative position, and a single fluid meansior efiecting movement of said plunger to and from operative position and for holding the same in operative or inoperative position within said cylinder and for rendering operative or inoperative said valve-controlled'means for supplying the,

eluding a single valve for controlling the operation of the same.

' References Cited in the file of this patent UNITED STATES PATENTS 607,265 McLean July 12, 1898' 842,953 Hellman Feb. 5, 1907 875,002 Sellew Dec. 31, 1907 1,416,475 Knowles May 16, 1922 1,522,465 Kimmel Jan. 6, 1925 7 1,806,664 Belden May 26', 193]. 1,877,572 Harrison Sept..13, 1932 2,250,349 Berquist 2 July 22, 1941 2,448,874 Flygare Sept. 7, 1948 2,620,815 Margraf Dec. 9,.1952 2,621,885 Schmitt Dec. 16, 1952 2,634,754 Rahn Apr. 14,1953 2,693,822 Gerow Nov. 9, 1954 

